How to remove this border?

Question

css

Good afternoon, I have a slick slide, for me it shows two slides at a time. And I needed to visually separate them with a line. I did it with border. but here's the question, how to make the border was only in the center, and there were no extra lines?
Or can it be done somehow differently than through border ?

Answer 1

nth-child()?

Answer 2

make through

div:nth-child(2n + 1) {
 position: relative;
}
div:nth-child(2n+1):before {
 content: "";
 position: absolute;
 top: 0;
 right: 0; (ну или сколько будет нужно)
 width: 1px;
 height: 100%;
 background: yellow;
}

Answer 3

.item + .item {
}